Most any three phase motor driver unit, three "filament" transformers,
add a bit of feedback....
Here's at least one simple option:
http://www.microchip.com/Developmenttools/ProductDetails.aspx?PartNO=3DDM33=
0015

Commonly available transformers are going to be less than optimum at 400
hz,
but at your specified power level, who cares.

-Denny
--=20
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